LM4935 datasheet(7/112 Pages) NSC

7 / 112 page

7.0 Connection Diagrams (Continued)

Pin Descriptions (Continued)

Pin Name

Type

Direction

Description

HP_VMID_FB

Analog

Inout

VMID Feedback in OCL mode, otherwise a 2nd headset detection input

MIC_DET

Analog

Input

Headset insertion/removal and Microphone presence detection input

CPI_NEG

Analog

Input

Cell Phone analog input negative

IRQ

Digital

Output

Interrupt request signal (NOT open drain)

I2S_SDO

Digital

Output

I2S Serial Data Out

I2S_SDI

Digital

Input

I2S Serial Data Input

LS_V

Supply

Input

Loudspeaker V

LS_V

Supply

Input

Loudspeaker V

CPI_POS

Analog

Input

Cell Phone analog input positive

CPO_NEG

Analog

Output

Cell Phone analog output negative

AUX_OUT_NEG

Analog

Output

Auxiliary analog output negative

I2S_WS

Digital

Inout

I2S Word Select Signal (can be master or slave)

I2S_CLK

Digital

Inout

I2S Clock Signal (can be master or slave)

LS_POS

Analog

Output

Loudspeaker positive output

LS_V

Supply

Input

Loudspeaker V

LS_NEG

Analog

Output

Loudspeaker negative output

CPO_POS

Analog

Output

Cell Phone analog output positive

AUX_OUT_POS

Analog

Output

Auxiliary analog output positive

D_V

Supply

Input

Digital V

MCLK

Digital

Input

Input clock from 0.5 MHz to 30 MHz

7.1 PIN TYPE DEFINITIONS

Analog Input —

A pin that is used by the analog and is

never driven by the device. Supplies are

part of this classification.

Analog Output — A pin that is driven by the device and

should not be driven by external sources.

Analog Inout —

A pin that is typically used for filtering a

DC signal within the device, Passive com-

ponents can be connected to these pins.

Digital Input —

A pin that is used by the digital but is

never driven.

Digital Output —

A pin that is driven by the device and

should not be driven by another device to

avoid contention.

Digital Inout —

A pin that is either open drain (I2C_SDA)

or a bidirectional CMOS in/out. In the

later case the direction is selected by a

control register within the LM4935.

LM4935 Datasheet(PDF) 7 Page - National Semiconductor (TI)

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